Observer effect explained
Observer effect, observer bias, observation effect, or observation bias may refer to a number of concepts, some of them closely related:
General experimental biases
- Hawthorne effect, a form of reactivity in which subjects modify an aspect of their behavior, in response to their knowing that they are being studied
- Observer-expectancy effect, a form of reactivity in which a researcher's cognitive bias causes them to unconsciously influence the participants of an experiment
- Observer bias, a detection bias in research studies resulting for example from an observer's cognitive biases
Physics
- Observer effect (physics), the impact of observing a physical system
- Probe effect, the effect on a physical system of adding measurement devices, such as the probes of electronic test equipment
Computing
Other uses
See also
- Bystander effect, the social psychological theory that states that individuals are less likely to offer help to a victim in the presence of other people
- Actor–observer asymmetry, a bias one makes when forming attributions about the behavior of others or themselves
- Demonstration effect, a effect on the behavior of an individual caused by observation of the actions of others and their consequences
- Personal equation, the idea that different observers have different reaction times, which can introduce bias when it comes to measurements and observations
- Placebo and nocebo effects, positive and negative effects autosuggested by a patient under an inert substance or treatment
- Schrödinger's cat, a thought experiment that illustrates a paradox of quantum superposition, devised by Austrian physicist Erwin Schrödinger
- Uncertainty principle, any of a variety of mathematical inequalities in quantum mechanics, introduced by German physicist Werner Heisenberg
